04/20/2015|CIMT 2015, World premiere – NHC 6300

Heavy-duty machining with maximum precision

With the world premiere NHC 6300 DMG MORI sets new standards on the Chinese market in the machining of chip-intensive materials.

The machine tools of the NHX series have long been recognised as premium products in the field of heavy-duty cutting. Based on this successful series DMG MORI has now adapted the NHC 6300 as a world premiere for the Chinese market and shows the new horizontal machining center at the CIMT 2015. The NHC 6300 is produced in Tianjin and also excels in its production-optimised stealth design while the machine tool manufacturer relies on proven equipment for its interior features. Its generous 630 x 630 mm pallet size and BT50 spindle constitute the perfect basis for the machining of even chip-intensive materials that are hard to machine.

Speed and precision are the outstanding features of the NHC 6300. Feed rates of up to 60 m/min promise high dynamics and, thanks to the torque drive in the B-axis, pallet indexing time (90°) is just 1.48 seconds. Added to this is its excellent positioning accuracy in the µm range. DMG MORI ensures the latter by using a light-weight travelling column as well as lighter moving parts. The extremely high demands on quality are also reflected in the consistent use of direct travel measuring systems. Machining quality is also enhanced by the short distance between the pallet center and the spindle nose. This allows the use of shorter tools for more stable machining. The maximum length of the NHC 6300 tools is sufficient to enable it to machine deep bores without the need of rotating the table.

Sturdy, reliable and cost-savingA sturdy machine bed with linear guideways in the X and Z-axis is the basis for powerful and stable machining on the NHC 6300. The symmetrical arrangement of the drives as close as possible to the center of gravity of the parts to be moved is equally as important for the stability of the machines as the spindle with its large inner bearing diameter of 120 mm.

The equipment features of the NHC 6300 are designed for maximum reliability and top process stability. The spindle, for example, with its improved labyrinth structure to prevent any coolant penetrating the spindle unit is very impressive. In addition the arm of the automatic tool changer (ATC) is equipped with a mechanical locking device that grips even long and heavy tools securely.

However, it is not only the fantastic process performance of this new development that is so impressive, it also reduces operating costs thanks to its lower power consumption. DMG MORI has managed to force energy requirements down by up to 40 %. This has been achieved by using fewer servo motors and LED lighting as well as a hydraulic unit with pressure accumulator whose pump is stopped in standby mode.

Where the control is concerned, the NHC 6300 uses the high-performance MAPPS IV operating system. This includes dialog programming in the standard version and there is also an ESPRIT CAM available as an option. The complex machining programming that can be achieved with the combination ofMAPPS IV and 3D-CAM makes it possible for users to respond flexibly to customer requirements. Additional support is provided by MORI-NET, the option for remote maintenance and monitoring of operating status.